Integrating and ground truthing the profiling float microrosette

集成和地面实况分析浮子微玫瑰花结

• 批准号: 1538580
• 负责人: Todd Martz
• 金额: $ 50.44万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-10-01 至 2021-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1538580&HistoricalAwards=false
• 关键词: Integrating; ground; truthing; profiling; float

The autonomous profiling float platform provides the potential for orders-of-magnitude improvement in ocean observing, relative to ships. This fact has already been realized by physical oceanographers studying the ocean heat budget and large-scale mixing processes and is now gaining momentum in the ocean biogeochemistry and ecological modeling communities. The development of new chemical sensors for measurement of CO2 dissolved in the ocean will improve our ability to quantify globally significant biogeochemical processes such as annual net community production in the ocean; and, in addition, the process of ocean acidification which is considered to be one of the most significant anthropogenic threats to the marine ecosystem. This research will develop a new technology known as the Micro-Rosette which will ultimately contribute a new tool to the short list of sensors available for integration into autonomous profiling floats.The Micro-Rosette is a device intended to operate specifically on board a profiling float. The system captures sub-milliliter volumes of seawater at pre-determined depths, stores the samples for a period of time, analyzes all of the discrete seawater samples ex situ (at the park depth), ejects them, and then repeats the cycle. When combined with a typical profiling float cycle, this approach adapts to the float's ascent/decent/park cycle, taking advantage of the multi-day park cycle to perform all of the chemical analyses. Determination of dissolved inorganic carbon is accomplished through acidification of the seawater sample, equilibration across a gas-permeable membrane, and quantification via a conductivity measurement. The Micro Rosette is purposefully built for profiling floats, and by taking advantage of the extended park cycle to carry out chemical analyses, this approach embraces the fact that many chemical analysis techniques require a time-dependent reaction or diffusion step leading to response times that make such analyses poorly suited for on-the-fly measurements. The application of this research is the measurement of total dissolved inorganic carbon, but the concept of a micro-rosette system is well-suited to several other types of analyses such as ammonia, organic carbon, and iron, and may potentially lead to a new family of profiling-float-ready wet chemical analyzers.

相对于船舶，自动谱图浮点平台为海洋观察的杂志提高提供了潜力。 研究海热预算和大规模混合过程的物理海洋学家已经实现了这一事实，现在正在海洋生物地球化学和生态建模社区中获得动力。 开发用于测量在海洋中溶解的二氧化碳的新化学传感器将提高我们量化全球重要生物地球化学过程的能力，例如海洋中的年度净社区生产；此外，海洋酸化过程被认为是对海洋生态系统最重要的人为威胁之一。这项研究将开发一种称为Micro-Rosette的新技术，该技术最终将为可用的传感器列表贡献一个新工具，用于将可用于自动分析的浮点部集成。微型摩根件是一种旨在在船上专门操作的设备。 该系统在预定的深度处捕获海水的亚毫升体积，将样品存储一段时间，分析所有离散的海水样品Exatu（在公园深度），驱逐它们，然后重复循环。 当与典型的浮点周期结合使用时，这种方法会利用多日公园周期来适应Float的上升/体面/公园周期，以执行所有化学分析。 通过酸化海水样品，跨气体渗透膜的平衡以及通过电导率测量来实现溶解的无机碳的测定。 微玫瑰花板是故意用于分析浮子的，并且通过利用扩展的公园周期进行化学分析，这种方法包含了这样一个事实，即许多化学分析技术都需要时间依赖时间的反应或扩散步骤，从而导致响应时间，从而使此类分析适合于实用测量。这项研究的应用是测量总溶解的无机碳，但是微型棒系统的概念非常适合其他几种类型的分析，例如氨，有机碳和铁，并可能导致新的proporge-float-float-float-float-Rese-Ready-Ready湿湿化学分析仪。